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// CODE SNIPPET

§1014-01 Masonry Equivalent Exit Enclosures

Title 1 ‒ Department of Buildings > 1000 Means of Egress > §1014-01 Masonry Equivalent Exit Enclosures
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   (a)   Scope. This rule provides the construction requirements for masonry equivalent exit enclosures in Groups R-1, R-2 and B occupancies.
   (b)   References. See sections 1014.2.1 (Two exits and exit access doorways, Exceptions 3 and 4) and 1019.1 (Enclosures required Exception 10) of the building code.
   (c)   Stud wall construction requirements. A masonry equivalent exit enclosure constructed as stud and wall board assembly shall satisfy the following requirements:
      (1)   Prescriptive stud and wall board assembly. A compliant wall assembly shall be substantially identical to, and shall provide an impact resistance equivalent to or exceeding, the performance of one (1) of the following:
         (i)   Materials. Impact resistant wall board sheathed on the interior surface of the exit enclosure wall assembly shall be tested by an approved testing agency. The wall board used as the interior face panel shall be listed by an approved agency to ASTM C 1629-06, Standard Classification for Abuse-Resistant Nondecorated Interior Gypsum Panel Products and Fiber-Reinforced Cement Panels, Impact Classification Level 2, and the base layer panel shall be a minimum 5/8 inch (16 mm) gypsum wall board. Wall board applied to the interior surface of the exit enclosure wall shall not reduce the clear width of the exit stairs below that required for means of egress by Chapter 10 of the building code.
         (ii)   Assembly. The wall assembly shall be at least two-hour fire resistance rated.
         (iii)   Installation shall comply with the following:
            (A)   Studs shall be minimum 3-1/2 inch (89 mm) depth cold-formed steel framing, at least 33 mils thick (20 gauge).
            (B)   Vertical studs shall be spaced at a maximum distance of 24 inches (610 mm), on center.
            (C)   Runners shall be securely attached at the floor and ceiling to structural element members and shall comply with the structural requirements of the building code.
            (D)   Wall boards shall be attached with No. 8 self-drilling bugle-head screws, 12 inches (305 mm), on center maximum, with a minimum depth of 5/8 inch (16 mm) penetration into the wall cavity.
            (E)   Joints between adjoining sheets of wall board shall be staggered from base layer with face panel layer.
      (2)   Performance-based requirements. For a wall assembly not classified in subdivision (1) above, a masonry equivalent wall assembly shall satisfy the following requirements:
         (i)   Materials. Materials constituting the interior side of the exit enclosure wall assembly shall be tested by an approved testing agency to ASTM C1629, Hard Body Impact Classification Level 3.
         (ii)   Assembly. The wall assembly shall have a minimum two-hour fire resistance rating. The wall assembly shall be tested by an approved testing agency to ASTM C1629, Soft Body Impact Classification Level 2.
         (iii)   Installation. Wall assemblies shall be anchored to structural members and shall comply with the structural requirements of the building code.
 

Related Code Sections


1022.1 Means of Egress, Enclosures Required
assemblies constructed in accordance with Section 712, or both. Exit enclosures shall have a fire-resistance rating of not less than 2 hours where connecting ...
NYC Building Code 2014 > 10 Means of Egress > 1022 Exit Enclosures > 1022.1 Enclosures Required
1015.2.1 Means of Egress, Two Exits or Exit Access Doorways
or masonry equivalent in accordance with department rules: The exit doors to such stairs shall be placed a distance apart equal to no less than 15 ...
NYC Building Code 2014 > 10 Means of Egress > 1015 Exit and Exit Access Doorways > 1015.2 Exit or Exit Access Doorway Arrangement > 1015.2.1 Two Exits or Exit Access Doorways
1014.2.1 Means of Egress, Two Exits or Exit Access Doorways
rating and constructed of masonry or masonry equivalent in accordance with department rules:   3.1. The exit doors to such stairs shall ...
NYC Building Code 2008 > 10 Means of Egress > 1014 Exit and Exit Access Doorways > 1014.2 Exit or Exit Access Doorway Arrangement > 1014.2.1 Two Exits or Exit Access Doorways
1019.1 Means of Egress, Enclosures Required
, such enclosures shall be constructed of masonry or masonry equivalent. Wall assemblies constituting masonry equivalent shall be constructed ...
NYC Building Code 2008 > 10 Means of Egress > 1019 Vertical Exit Enclosures > 1019.1 Enclosures Required
403.2.3 Special Detailed Requirements Based on Use and Occupancy, Structural Integrity of Exit Enclosures and Elevator Hoistway Enclosures
For all high-rise buildings, exit enclosures and elevator hoistway enclosures shall comply with Sections 403.2.3.1 through 403.2.3.4 ...
NYC Building Code 2014 > 4 Special Detailed Requirements Based on Use and Occupancy > 403 High-Rise Buildings > 403.2 Construction > 403.2.3 Structural Integrity of Exit Enclosures and Elevator Hoistway Enclosures
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